How to display all valid results when converting fraction form to decimal form? Specifically when the fraction expression includes roots of negative numbers.

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Wayne
Wayne 2021 年 4 月 12 日
回答済み: Gargi Patil 2021 年 4 月 15 日
For example, (-1)^(1/3)+2 is something what I got from subsituting varibles into a symbolic equation, and I would like to see all the complex results and eliminate ones that have imaginary components.

回答 (1 件)

Gargi Patil
Gargi Patil 2021 年 4 月 15 日
To view all the roots of an expression, you can use the function roots().
The following code returns all the roots of (-1)^(1/3)+2:
allRoots = 2 + roots([1 0 0 1]);
To obtain only the nth real root, the function nthroot() can be used.
The following code returns the real root for the expression (-1)^(1/3)+2:
realRoots = 2 + nthroot(-1, 3);

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